Exam (elaborations)
Csci 340 Set 1 Questions and answers latest update
- Course
- CSCI 340
- Institution
- University Of Illinois - Chicago
Csci 340 Set 1 Questions and answers latest update
[Show more]
Content preview
Csci 340 Set 1System calls invoked by user programs are executed under ANS✔✔ Kernel
mode
Suppose that an operating system kernel is designed such that after sending an
I/O request to a device controller, the kernel periodically inquires with the
device controller about the status of that I/O request. What do we call this
behavior? ANS✔✔ Polling
After DMA is introduced into a computer system, to what extent are hardware
I/O interrupts utilized by device controllers in file read operations ANS✔✔
One interrupt will be generated per each block read
In the lectures we discussed an approach to finding the minimum number in
an unsorted file of 10,000 numbers utilizing a multithreaded patttern with a
main thread and 10 pthreads. How many comparisions does the main thread
perform after all 10 pthreads terminate? ANS✔✔ Between 101 and 1000
Choose those items which are features of direct memory access (DMA).
ANS✔✔ 1.
The CPU is able to do more productive work.
2.
Traffic is reduced on the system bus.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Schoolflix. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $14.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
81298 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now